Permutation-lock



E. BBRNHARDT.

Permutation Look. N0. 237, 950.- Patented Feb. 22,1881.

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N.PETER8, FKOTO-LITHOGRAPNER. WASHINGTUN. DV C.

UNITE *rares ATENr Fries.

ERNST BERNHARDT, OF CINCINNATI, OHIO.

PERMUTATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 237,950, dated February22, 1881.

l Application filed December 27, 1879.

To all whom it may concern:

Be it known that I, ERNST BERNHARDT, of Cincinnati, Hamilton county,State of Ohio, have invented a new and useful Improvement inPermutationLoc-ks, of which the following' is a specification.

Theinvention consistsin an improved means to disconnect the notch edrims of the tumblers from their drivin g-hubs and prevent them fromturning, so that the desired combination may be arranged by operating'the dial-knob.

In the accompanying drawings, Figurel is plan view of the lock, lookingfrom the back, part of the fback plate being broken away to show theform of the doggin g fence-har. Fig. 2 is a longitudinal section takenin the plane of the axis of the lock-arbor. Fig. 3 is a longitudinalvertical section of the lock in a plane at right angles to the viewshown in Fig. 2. Fig. 4 is a transverse section taken in front of thedrivin g-tumbler, looking to the front of the lock. In Figs. 2 and 3 thespindle is represented as drawn forward in position to operate thetumblers.

Identical parts in the different figures are indicated by similarreference-letters.

A represents the front plate of the lock. Projecting back centrally fromthis plate is a hub, B, through which the lock-spindle passes to enterthe hub of the driving-tumbler C, into which itis screwed and held fromturning by a key in the usual manner. This drivin g-tumbler, as shown inFigs. 2 and 3, is composed of two disks secured together. The outer disk(or if it be made in one piece the outer half) is a plain wheel, and theinner disk (or half of the tumbler) is notched to receive the projectionupon the fence or dog. The inner face of C carries the usual stud-pin tooperate the locktumblers. The tumblers, of which there may be anydesired number, are composed ot' outer notched riins, D, and innerflanged hubs, E. The flange of each hub E is provided with notches e,adapted to be engaged by a pin, d, in the adjacent rim D, so as tocouple the parts together when the rim is pushed back against the flangeof the hub. These tumblers are incased between two cylindrical segments,F F, which are grooved to receive the outer rims, D, of the tumblers,and are litted to slide between plate A and back cap, Gr, in standards HH and I.

From the upper edges of F F guide-pins ff project through the cap G.These pins have transverse slots upon the inside and above the plate Grto receive a cam or inclined slide, J. The slide is guided vertically bya screw passing through a slot into the cap G, and has a projectingthumb-plate,j, by which it is raised and lowered.

Thelower standard, I, which is secured to the plate A by screws topermit the ready removal and replacement ofthe segments F F, has pins e'projecting np between the tumblers D.

The (logging device is a lever, K, journaled upon a stud, L. The outerend ot the lever has an enlargement, M, which is, when the safe islocked, held up back of the projection upon the safe-bolt N. Thefence-dog P, which projects down from the center of lever K, has, asshown, a projection at the inner end, which rests, when the arbor isdrawn forward to operate the tumblers, upon the periphery ofthe outerdisk ot' the driver, and holds the fence above the tumblers D. The saineresult will, it is obvious, be accomplished by making thedriving-tumbler larger than the loose tumblers and making the lower edgeof the fence straight. To lessen the friction a wheel may be ltted inthe end of the fence-dog P, to ride upon the tumbler C.

The spindle and driving-tumbler C have a limited play between thefrontand back plates of the lock, so that when the spindle is drawn out tobring the stud-pin upon the driver C in a position when revolved tostrike the pin upon the adjacent tumbler, the dog P will be held aboveand out ot' contact with the notched rims D, andas the, driving-pin willnot revolve the tumblers when the spindle is pushed back, it will beimpossible to feel the tumblers or subject them to the action of amicrometer.

The inode of changing the combination to open the lock is as follows:The known combination is rst set up and the dog allowed to drop into thenotches in the tumblers. This brings the opposite and smaller notches dof tumblers D in line with the pins projecting up from standard I. Theslide J is now drawn up, bringing the grooved segments F against theback cap, G. The tumbler-s D are by this action slipped back upon thehubs E. and disconnected from them, and the'lower notches, d', in rims Dengaged by pins e', projecting IOO up from standard I. The rims D arethus held from turning. Now, by drawing the arbor forward and goingthrough the operation of setting up the proposed combination inprecisely the same way as if it were intended to open the lock by suchnew combination, the upper notches ot' thc tumblers are brought intoproper relation with their en gagin g-pins in hubs E and the driving-stud pins. The slide J is now pushed down, carrying the tumblers Dback and coupling them with the hubs E.

It is evident that the slide J may be in the form of a disk withcam-face, or that the segments F F may be carried back and forth by anywell-known lneans without varying the principle ot' the invention, andthat the shape of the (logging-lever K may be varied to suit thedifferent kinds of bolt-Work now in use.

I claim- 1. In combination with the tumblers ofa permutation-lock, whichtumblers are composed ot' an inner hub and outer rim, the slidinggrooved segments F F, for the purpose of holding the rim and hub unitedwhen the lock is in use and disconnecting said rims from their hubs tochange the combination, substantially as specified.

2. The combination, substantially as hereinbefore set forth, of thetumblers D E, segments F F, grooved standards H H and I, said standard Ihaving projecting pins to enter notches in rims D to prevent the rimsfrom turning` when disconnected from theirhubs to change thecombination.

3. rlhe combination, substantially as specitied, of the tnmblers,composed ot' parts l) E, the segments F F, cam-slide J, and cap-plate G,for the purpose set forth.

ERNST BERNH ARDT.

Witnesses:

M. W. OLIVER, GEO. J. MURRAY.

